PharyngealTonsil

PharyngealTonsil (excluding Malignant Melanoma)

C11.1

C11.1 Pharyngeal tonsil

Note: CS Site-Specific Factor 25 is used to discriminate between posterior wall of nasopharynx, staged with nasopharynx, and pharyngeal tonsil, staged with oropharynx. Both sites are coded to ICD-O-3 code C11.1.